dan springer has been on top of this. what's the latest? >> you talk about turbulence. the grounding is a major blow to boeing and the airlines that have sunk billions of dollars into this plane of the future. let's face it, this is boeing's showcase plane. airlines are scrambling to bring in jets to replace the 787. that has led to flight delays and cancellations. many passengers stranded, their plans in limbo, but for the most part saying better safe than sorry. >> i rather flight tomorrow or fly tight by different airplane line that continue the risk anything happen. >> the faa's directive followed the emergency landing 0 of 00787 plane in japan. a lithium ion battery overheated and hot chemicals sprayed out of it. eight days earlier, a battery in a different part of the plane overheated, cracked open and caught fire. so the faa has told boeing they have to prove the battery is safe before the dreamliners could fly again. it could take days, weeks, perhaps moss. the battery manufacturer said is too take months to figure out the problem. we know the electrical system